CN102821303B - A kind of Pixel-level video information network real-time graded compression transmitting method - Google Patents
A kind of Pixel-level video information network real-time graded compression transmitting method Download PDFInfo
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Abstract
The present invention provides a kind of Pixel-level video information network real-time graded compression transmitting method, including following three steps: the transmitting terminal Pixel-level video information to transmit single frame video image with Pixel-level mode one by one carry out implements spatial scalable compression process；Pixel-level video information after compressed encoding is carried out network transmission；At receiving terminal, the Pixel-level video information after transmission is displayed as required.The present invention adopts the mode of implements spatial scalable compression that Pixel-level video information is compressed coding, reduces the data volume of transmission on the one hand, makes the Pixel-level video information after compression that the requirement of network broadband to be reduced；Less data can be used to represent more quantity of information after compressed encoding on the other hand, receiving terminal can be restored quality good video image when the Pixel-level video information after compression is recovered, thus improve the image quality after transmission, thus contradiction between balance video signal transmitted data amount, image quality and real-time preferably.
Description
Technical field
The present invention relates to video information transmission technical field, be specifically related to a kind of Pixel-level video information network real-time graded compression transmitting method.
Background technology
Development along with video display technology and display terminal manufacturing technology, resolution and the size of display terminal required by all kinds of Video Applications are all improving constantly, not only occur in that 1920*1080 and higher resolution, and the size of display terminal also constantly breaks through the limit of manufacturing process, especially the appearance of screen splicing technology and projection integration technology further increases display resolution and the size of display terminal especially.Meanwhile, the application such as modern media and communications, Window Display and public's demonstration makes distributed video Display Technique be able to through engineering approaches.Popularization day by day along with this kind of application, people start to pursue single video and show that the high definition of node and the video of higher resolution show, the Large video display node that even some is made up of screen splicing system and projection integration system is also deployed in distributed video display system, which greatly enhances the video data handling capacity of single video node.So, the development of video display technology has no longer only been limited by video signal treatment technique itself, but is more limited by the throughput of transmissions of video information, quality and real-time in some applications.
In the real-time video transmission signal processing of Pixel-level high definition or higher resolution, a maximum difficult problem is that the Pixel-level video information of the higher resolution how solving 2.8Gbps Pixel-level HD video information per second or more than 2.8Gbps is from one end " moving " of network to the other end.For the network bandwidth conventional at present, 100,000,000 general cable networks and the wireless network based on IEEE802.11n all cannot be competent at this work.
Being found with investigation and research of products by theoretical research, feasible solution route generally has two kinds: approach to be exactly improve the bandwidth upper limit of existing network, and upgrading network infrastructure adapts to real-time video transmission at a high speed；Another approach is exactly compression or the data volume reducing the required transmission of video signal, thus meeting existing network bearing capacity.For the former, it is necessary to the existing network infrastructure of large-area upgrading, its cost is high, quantities is big, and operability is poor；For the latter, it is necessary to solve how to utilize network infrastructure, under not changing any situations with good conditionsi such as network topology wiring and route exchange device, it is achieved the networking real-time Transmission of video image vegetarian refreshments signal.
For networking real-time video transmission and Display Technique, the core technology related to mainly has two: one to be the compress technique of video information；Two is Network Transmitting technology.
In the compress technique of video information, for coding techniques such as quality and the real-time of guarantee video information transmission, H.264/AVC numerous domestic and international products all have employed, JPEG2000.These coding techniques have standardization level height, technology maturation, the advantages such as abundant, applied range of exploiting natural resources.At present, in field of video monitoring at home, employ H.264/AVC coding techniques widely.But, the core technology of these coding techniques all rests in minority overseas enterprise hands, and any other enterprise is difficult to customize relevant specific products according to demand；Meanwhile, it is limited by the great number commercialization expense as H.264/AVC waited coding techniques, also makes some enterprises be difficult to be applied in product these coding techniques.
In the Network Transmitting of video signal, numerous domestic and international enterprises are all proposed the correlation technique of independent intellectual property right, but core purpose is all solve the contradiction between video information data amount and network transmission bandwidth.For H.264/AVC coding techniques, in order to reduce the video information data amount after coding, this technology have employed inter-frame prediction techniques and makes the data of only transmission reaction interframe change between two reference frames, although this can be substantially reduced the data volume of video information, but, this technology is easily caused continuous print frame data mistake, thus producing the phenomenon of frame losing and distortion, reduces the quality that video shows；Further, H.264/AVC coding techniques need to by compressed object buffer number frame to complete cataloged procedure, this have impact on the real-time of video information to a certain extent.And although the Static Picture Compression technology such as JPEG2000 can be applied in video information compression and solve problem above, but owing to needing what retain each frame video in transmitting procedure completely to encode data, so the video information data amount after its compression is much larger than the video compression technology such as H.264/AVC.So, prior art is to adopt stream media technology, relevant between former frame and a later frame, has impact each other, is balanced difficult in transmission between quantity of information, image quality, real-time three.
Summary of the invention
For this, to be solved by this invention be existing Pixel-level video information cannot under existing network bandwidth condition the technical problem of real-time Transmission, it is provided that a kind of Pixel-level video information network real-time graded compression transmitting method.
For solving above-mentioned technical problem, the technical solution used in the present invention is as follows:
A kind of Pixel-level video information network real-time graded compression transmitting method, comprises the steps:
Step one, the Pixel-level video information will transmitted at transmitting terminal are compressed coding, described compressed encoding be to the single-frame images in described Pixel-level video information with Pixel-level mode one by one carry out implements spatial scalable compression process；
Step 2, the image information after compressed encoding is carried out network transmission；
Step 3, receiving terminal to transmission after Pixel-level video information display.
Described Pixel-level video information network real-time graded compression transmitting method, described implements spatial scalable compression processes and includes a primary compression and secondary compression at least one times, carries out secondary compression after primary compression again.
Described Pixel-level video information network real-time graded compression transmitting method, described primary compression is undertaken 2 by the downsampling filter in resampling wave filternReduce；Described secondary boil down to compresses further through non-integral multiple convergent-divergent wave filter.
Described Pixel-level video information network real-time graded compression transmitting method, step 2 also includes the judgement step of transmission mode:
(1) judge whether one-way network bandwidth disclosure satisfy that the transmission requirement of the image information after compressed encoding；
(2) as met requirement, then unicast communication pattern is used；As being unsatisfactory for requirement, then use multidiameter delay transmission mode.
Described Pixel-level video information network real-time graded compression transmitting method, in described primary compression, the line number of original pixels level video image and columns are respectively reduced into original half so that image resolution ratio is reduced into 1/2nd of described original pixels level video image.
Described Pixel-level video information network real-time graded compression transmitting method, in described secondary compression, line number and the columns of the video pixel level image after the process of described primary compression are respectively reduced 2/3rds by non-integral multiple convergent-divergent wave filter again, make video image resolution is described original pixels level video image 1/3rd of output.
Described Pixel-level video information network real-time graded compression transmitting method, in described step 3, when user needs small size, low-quality video image, is directly shown to display terminal by the Pixel-level video information after described transmission.
Described Pixel-level video information network real-time graded compression transmitting method, in described step 3, when user needs large scale, high-quality Pixel-level video image, displays after adopting the algorithm process processing contrary with described implements spatial scalable compression again.
Described Pixel-level video information network real-time graded compression transmitting method, described network is 100 m ethernet.
Described Pixel-level video information network real-time graded compression transmitting method, described network is the wireless network based on IEEE802.11n.
The technique scheme of the present invention has the advantage that compared to existing technology
(1), the present invention a kind of Pixel-level video information network real-time graded compression transmitting method is provided, including following three steps: the single frame video image of the Pixel-level video information will transmitted at transmitting terminal with Pixel-level mode one by one carry out implements spatial scalable compression process；Pixel-level video information after compressed encoding is carried out network transmission；At receiving terminal, the Pixel-level video information after transmission is displayed as required.The present invention to the single frame video image in Pixel-level video information with Pixel-level mode one by one carry out implements spatial scalable compression process, for existing coding techniques uses a kind of compression method, this compression coding mode reduces the data volume of transmission on the one hand, make the image information after compression that the requirement of network broadband to be reduced, the reduction of data volume makes the time decreased required for same Pixel-level video information transmission, improves the utilization rate of network；Less data can be used to represent more quantity of information after compressed encoding on the other hand, receiving terminal can be restored quality good video image when the Pixel-level video information after compression is recovered, thus improve the image quality after transmission, thus contradiction between balance video signal transmitted data amount, image quality and real-time preferably, also has certain facilitation to the development of China's Internet of Things and next generation network video technique.Pixel-level video information network real-time graded compression transmitting method provided by the invention not only makes Pixel-level video information can adapt to existing network bandwidth condition, and image information transmission can be carried out without changing any network infrastructures such as existing network layout and route exchange device, relative to the bandwidth upper limit improving existing network, upgrading network infrastructure, it is greatly saved cost, workable.
(2), the implements spatial scalable compression based on pixel that the present invention proposes processes and includes a primary compression and secondary compression at least one times, primary compression adopts high performance resampling wave filter, secondary compression adopts non-integral multiple convergent-divergent wave filter, raw video image is carried out the reducing compressed process of classification of low complex degree, high-performance, low latency, under the precondition that visual quality loss is little, greatly reduce the bandwidth required for Pixel-level video information transmission.
(3), the transmission means that the present invention proposes includes unicast communication pattern and multidiameter delay transmission mode, Pixel-level video information after compressed encoding if able to transmit in existing network, just adopt unicast communication pattern, otherwise adopt multidiameter delay transmission mode, this mode solves the real-time Transmission problem in a network of the Pixel-level video information after compressed encoding, enables the Pixel-level video information after compressed encoding to transmit in existing network.
(4), the present invention needs according to user, the Pixel-level video information after described transmission is shown to display terminal, there is good adaptivity.
Accompanying drawing explanation
In order to make present disclosure be more likely to be clearly understood, below according to specific embodiments of the invention and in conjunction with accompanying drawing, the present invention is further detailed explanation, wherein
Fig. 1 is the flow chart of one embodiment of the invention a kind of Pixel-level video information network real-time graded compression transmitting method.
Detailed description of the invention
Embodiment 1:
A specific embodiment of of the present invention a kind of Pixel-level video information network real-time graded compression transmitting method is given below, shown in Figure 1, a kind of Pixel-level video information network real-time graded compression transmitting method, comprise the steps:
Step one, the Pixel-level video information will transmitted at transmitting terminal are compressed coding, described compressed encoding be to the single-frame images in described video information with Pixel-level mode one by one carry out implements spatial scalable compression process, including a primary compression and once secondary compression, after primary compression, carry out secondary compression again.Pixel-level mode is the processing mode that the pixel value for pixel each in single-frame images carries out, and the non-Pixel-level mode of prior art is to characterize with as far as possible few bit number and rebuild image under given distortion.
In the present embodiment, described implements spatial scalable compression processes and includes a primary compression and once secondary compression, and step is:
A01: primary compression: undertaken 2 by the downsampling filter in resampling wave filternReduce, be specially and line number and the columns of raw video image are respectively reduced into original half so that image resolution ratio is reduced into 1/2nd of described raw video image.
A02: secondary compression: compress further through non-integral multiple convergent-divergent wave filter, the line number and the columns that are specially the video image after described primary compression is processed by non-integral multiple convergent-divergent wave filter respectively reduce 2/3rds again, make video image resolution is raw video image 1/3rd of output.Pixel-level video information in the present embodiment adopts computer display card to be primary video information sources.
As other embodiments, described primary compression can carry out 2nReducing, n can be the integer of more than 2, and the number of times of described secondary compression can also be twice, three times or more than three times.
Step 2, the Pixel-level video information after compressed encoding is carried out network transmission.Step 2 includes the judgement step of transmission mode:
B01: judge whether one-way network bandwidth disclosure satisfy that the transmission requirement of the Pixel-level video information after compressed encoding.
B021: as met requirement, then use unicast communication pattern.
B022: as being unsatisfactory for requirement, then use multidiameter delay transmission mode, it is averaged segmentation by the Pixel-level video information after described compression, then the video information after these being split is assigned on each road network and is transmitted, finally at receiving terminal, the video information after described segmentation is carried out against dividing processing, thus the Pixel-level video information after receiving terminal is compressed.
Step 3, receiving terminal to transmission after Pixel-level video information display, comprise the steps:
C01: when user needs small size, low-quality video image, is directly shown to display terminal by the Pixel-level video information after described transmission.
C02: when user needs large scale, high-quality Pixel-level video image, display again after adopting the algorithm process processing contrary with described implements spatial scalable compression, namely first carry out primary amplification with described non-integral multiple convergent-divergent wave filter, then carry out showing again after secondary is amplified with up-sampling matched filter.
As other embodiments, the network carrying out network transmission can also be the wireless network based on IEEE802.11n, it is also possible to be that other are suitable for the dedicated network of video information transmission.
Pixel-level video information network real-time graded compression transmitting method provided by the invention, applied widely, can be used for the video image of SD, high definition and higher resolution.
Embodiment 2:
On the basis of embodiment 1, for resolution for 1920*1080 Pixel-level high clear video image, the data volume I=1920x1080x60x24bit/s=2985984000bit/s of its real-time Transmission, it is clear that cannot existing 100 m ethernet or based on the bandwidth condition of the wireless network of IEEE802.11n under real-time Transmission.Implement step as follows:
Step one: transmitting terminal compressed encoding
Pixel-level HD video information is encoded by sending ending equipment, namely to the single frame video image of above-mentioned high clear video image with Pixel-level mode one by one carry out low complex degree, high-performance, low latency implements spatial scalable compression process.The described downsampling filter first passed through in resampling wave filter carries out 2nThe primary compression reduced, is respectively reduced into original half by the line number of original pixels level video image and columns so that the Pixel-level video image resolution after primary compression is reduced into original pixels level video image/ 4th of data volume boil down to original data volume, namelyThen through the secondary compression further of non-integral multiple convergent-divergent wave filter, line number and the columns of the Pixel-level video image after compressing further respectively reduce 2/3rds again, and the Pixel-level video image resolution making output is original pixels level video imageThrough above-mentioned process, amount of image information is original data volume 1/9th of final required transmission, namely
Step 2: parallel network transmits
After compressed encoding, the quantity of information of Pixel-level video image becomesMake video information transmission that the requirement of the network bandwidth to be substantially reduced.But,Quantity of information still cannot at the existing 100 m ethernet of single channel or based on the transmission in wireless network of IEEE802.11n.Transmitting procedure logic according to Fig. 1,Quantity of information need use multidiameter delay network transmission mode.To use 4 road 100 m ethernets or the wireless network based on IEEE802.11n to carry out parallel transmission, then the quantity of information of the required transmission of each road network isThe one-way network bandwidth of above network is entirely capable of meeting requirement.
After network transmits, receiving terminal uses the algorithm with transmitting terminal contrary by data recombination, obtainsVideo information.
Step 3: receiving terminal decoding and display
If the Pixel-level HD video information of receiving terminal display 1920*1080, need to carry out and the process of transmitting terminal coding phase inversely processing, namely use the described up-sampling matched filter Recovery processing in described non-integer convergent-divergent wave filter and resampling wave filter.First pass around non-integer convergent-divergent filter process to obtain quantity of information and bePixel-level HD video information, be then passed through up-sampling matched filter in resampling wave filter and process and obtain the Pixel-level HD video information that quantity of information is I.Finally the Pixel-level HD video information obtained is transmitted to display terminal output display.
In sum, this example achieves classification convergent-divergent and the parallel transmission of the real-time pixel level high clear video image of 1920*1080 resolution.
Embodiment 3:
On the basis of above-described embodiment 2, if local terminal is shown as low-resolution video image in step 3, local terminal is panel computer, notebook computer such as, desktop computer, the equipment such as smart mobile phone, user only need to obtain adapting to the low-resolution video information of local terminal at receiving terminal, then step 3 adopts the mode directly displayed.Such as, receiving terminal need to show the Pixel-level video image of 640*360, and according to the handling process of step 3 in Fig. 1, receiving terminal is without decoding, and only needs to compriseThe video image of quantity of information displays, and the resolution of the video image of display is raw video imageThe i.e. Pixel-level video image of 640*360.
Obviously, above-described embodiment is only for clearly demonstrating example, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also cannot all of embodiment be given exhaustive.And the apparent change thus extended out or variation are still among the protection domain of the invention.
Claims (8)
1. a Pixel-level video information network real-time graded compression transmitting method, it is characterised in that comprise the steps:
Step one, the Pixel-level video information will transmitted at transmitting terminal are compressed coding, described compressed encoding be to the single frame video image in described Pixel-level video information with Pixel-level mode one by one carry out implements spatial scalable compression process；Described implements spatial scalable compression processes the secondary compression including a primary compression and twice, three times or more than three times, carries out secondary compression after primary compression again；Described primary compression is undertaken 2 by the downsampling filter in resampling wave filternReduce；Each described secondary boil down to compresses further through non-integral multiple convergent-divergent wave filter, and in described secondary compression, line number and the columns of the video pixel level image after the process of described primary compression are respectively reduced 2/3rds by non-integral multiple convergent-divergent wave filter again；
Step 2, the Pixel-level video information after compressed encoding is carried out network transmission；
Step 3, receiving terminal to transmission after Pixel-level video information display.
2. Pixel-level video information network real-time graded compression transmitting method according to claim 1, it is characterised in that step 2 also includes the judgement step of transmission mode:
(1) judge whether one-way network bandwidth disclosure satisfy that the transmission requirement of the image information after compressed encoding；
(2) as met requirement, then unicast communication pattern is used；As being unsatisfactory for requirement, then use multidiameter delay transmission mode.
3. Pixel-level video information network real-time graded compression transmitting method according to claim 1 and 2, it is characterized in that, in described primary compression, the line number of original pixels level video image and columns are respectively reduced into original half so that image resolution ratio is reduced into 1/2nd of described original pixels level video image.
4. Pixel-level video information network real-time graded compression transmitting method according to claim 1 and 2, it is characterized in that, in described secondary compression, line number and the columns of the video pixel level image after the process of described primary compression are respectively reduced 2/3rds by non-integral multiple convergent-divergent wave filter again, make video image resolution is described original pixels level video image 1/3rd of output.
5. Pixel-level video information network real-time graded compression transmitting method according to claim 3, it is characterized in that, in described step 3, when user needs small size, low-quality video image, directly the Pixel-level video information after described transmission is shown to display terminal.
6. Pixel-level video information network real-time graded compression transmitting method according to claim 4, it is characterized in that, in described step 3, when user needs large scale, high-quality Pixel-level video image, display again after adopting the algorithm process processing contrary with described implements spatial scalable compression.
7. Pixel-level video information network real-time graded compression transmitting method according to claim 6, it is characterised in that described network is 100 m ethernet.
8. Pixel-level video information network real-time graded compression transmitting method according to claim 6, it is characterised in that described network is the wireless network based on IEEE802.11n.
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| CN105245889B (en) * | 2015-09-24 | 2017-12-12 | 清华大学深圳研究生院 | A kind of reference frame compression method based on stratified sampling |
| CN105611341B (en) * | 2015-12-21 | 2019-02-22 | 小米科技有限责任公司 | A kind of method, apparatus and system for transmitting image |
| CN110033781B (en) * | 2018-01-10 | 2021-06-01 | 盛微先进科技股份有限公司 | Audio processing method, apparatus and non-transitory computer readable medium |
| EP3834441B1 (en) * | 2018-08-07 | 2023-10-04 | Signify Holding B.V. | Compressive sensing method and edge node of distributed computing networks |
| CN112188237A (en) * | 2019-07-04 | 2021-01-05 | 国家广播电视总局广播电视科学研究院 | Program distribution method and device, receiving method, terminal device and medium |
| CN115314731A (en) * | 2022-06-23 | 2022-11-08 | 浙江大华技术股份有限公司 | Video processing system, method, computer device and storage medium |
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